document.write( "Question 969866: there are 15 boys and 13 girl in a maths class. the mean time spent on homework each week for the boys is 5.5 hours. the mean time spent on the girls homework is 7.2 hours. Find the mean time spent on homework for all students in the class. \n" ); document.write( "

Algebra.Com's Answer #592688 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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there are 15 boys and 13 girl in a maths class.
\n" ); document.write( " the mean time spent on homework each week for the boys is 5.5 hours.
\n" ); document.write( " the mean time spent on the girls homework is 7.2 hours.
\n" ); document.write( " Find the mean time spent on homework for all students in the class.
\n" ); document.write( ":
\n" ); document.write( "One way to do this is, there are 28 in the class.
\n" ); document.write( "A = $\"%28%2815%285.5%29%2B13%287.2%29%29%29%2F28\"$
\n" ); document.write( "A = $\"%28%2882.5%2B93.6%29%29%2F28\"$
\n" ); document.write( "A = $\"176.1%2F28\"$
\n" ); document.write( "A = 6.29 hrs \n" ); document.write( "

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